Engine-Codes - Generic - B0432

B0432 - Low Voltage Level On The Control Circuit Of The RR Defog Relay

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What is this?
Table of contents

B0432 Possible Causes

  • Faulty Defog Relay
  • Defog Relay harness is open or shorted
  • Defog Relay circuit poor electrical connection
  • Faulty Body Control Module (BCM)

How is the B0432 code repair?

Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

What is the cost to diagnose the B0432 code

Labor: 1.0

The cost to diagnose the B0432 code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.
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Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

B0432 Meaning

The Body Control Module (BCM) monitors the voltage level on the control circuit of the RR DEFOG relay. The voltage level should be near system voltage while the RR DEFOG relay is de-energized. The voltage will be pulled low when the BCM energizes the RR DEFOG relay. The BCM test the control circuit of the RR DEFOG relay while the relay is de-energized.

More Information

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Information for specific makes

  • B0432 BUICK Low Voltage Level On The Control Circuit Of The RR Defog Relay
  • B0432 CADILLAC Low Voltage Level On The Control Circuit Of The RR Defog Relay
  • B0432 CHEVROLET Low Voltage Level On The Control Circuit Of The RR Defog Relay
  • B0432 GMC Low Voltage Level On The Control Circuit Of The RR Defog Relay

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